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Can I read Ratchetting-fatigue behavior of a 42CrMo steel under near-yield mean stress on EtoBox?
Ratchetting-fatigue behavior of a 42CrMo steel under near-yield mean stress by Guoying Sui; Zhenqiang Wang; Xuming Fang; Guhui Gao; Chengzhi Zhao; Yibin Guo; Yixing Song; Fengchun Jiang is a Engineering article available to read on EtoBox.
What is Ratchetting-fatigue behavior of a 42CrMo steel under near-yield mean stress about?
42CrMo high-strength structural steel is widely used to manufacture the bolt fasteners of engineering machinery, which are subjected to cyclic loading with a near-yield pre-stress in service. In this contribution, we focused on the intrinsic correlation between macroscopic ratchetting-fatigue behavior and microscopic mechanisms in a quenching & tempering 42CrMo HSS steel under near-yield mean stress (σm) conditions. The results indicate that fatigue strength obviously decreases as σm increases from low level (51.9% of yield strength, σy) to near-yield range (80–95% of σy), which is followed by a slight decrease with σm increasing in near-yield σm range. Two distinct fracture patterns were found: (i) high-cycle fatigue failure under low σm and (ii) ratchetting-fatigue failure with plastic strain due to obvious ratchetting effect under near-yield σm. Compared to low σm, near-yield σm leads to the disappearance of fatigue striations, but emerging of some plastic micro-strains, sub-grains and high-density dislocation cells. Fatigue crack-path analysis demonstrates that the decreases in secondary crack size and crack deflection degree are favorable to fatigue crack propagation at a high
Who reads Ratchetting-fatigue behavior of a 42CrMo steel under near-yield mean stress?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Guoying Sui; Zhenqiang Wang; Xuming Fang; Guhui Gao; Chengzhi Zhao; Yibin Guo; Yixing Song; Fengchun Jiang
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)